THYMUS
The thymus gland is described further under the lymphatic system.
This gland is located posterior to the sternum, in the mediastinum. It is large
in infants and children; however, it reduces in size after puberty. The thymus
is important for immunity and contains lymphocytes in various stages of
develop-ment. Lymphocytes processed in the thymus, known as T lymphocytes,
migrate to various parts of the body.
The gland is considered to have endocrine func-tion because it
secretes many hormones (thymosins)
that stimulate the synthesis and development of lym-phocytes.
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